Studies on foreign policy think tanks have too often remained disconnected from the analysis of foreign policy outcomes. Yet, investigating the development, functions and influence of think tanks can provide valuable insights into the context in which foreign policy is formulated. The Czech Republic and Poland represent interesting comparative cases in this regard: while Polish think tanks are more numerous and tend to be better placed in international rankings, they are less involved in the policymaking process than their Czech counterparts. This contrast has mainly to do with the sociology of foreign policy elites and the role of political parties in both countries.